V$STREAMS_APPLY_SERVER displays information about each apply server and its activities. An apply server receives events from the apply coordinator for an apply process. For each event received, an apply server either applies the event or sends the event to the appropriate apply handler.

RECORD LOW-WATERMARK - Performing an administrative job that maintains information about the apply progress, which is used in the ALL_APPLY_PROGRESS and DBA_APPLY_PROGRESS data dictionary views

ADD PARTITION - Performing an administrative job that adds a partition that is used for recording information about in-progress transactions

DROP PARTITION - Performing an administrative job that drops a partition that was used to record information about in-progress transactions

EXECUTE TRANSACTION - Applying a transaction

WAIT COMMIT - Waiting to commit a transaction until all other transactions with a lower commit SCN are applied. This state is possible only if the COMMIT_SERIALIZATION apply process parameter is set to a value other than none and the PARALELLISM apply process parameter is set to a value greater than 1.

WAIT DEPENDENCY - Waiting to apply a logical change record (LCR) in a transaction until another transaction, on which it has a dependency, is applied. This state is possible only if the PARALELLISM apply process parameter is set to a value greater than 1.

WAIT FOR NEXT CHUNK - Waiting for the next set of logical change records (LCRs) for a large transaction

XIDUSN

NUMBER

Transaction ID undo segment number of the transaction currently being applied

XIDSLT

NUMBER

Transaction ID slot number of the transaction currently being applied

XIDSQN

NUMBER

Transaction ID sequence number of the transaction currently being applied

COMMITSCN

NUMBER

Commit system change number (SCN) of the transaction currently being applied

DEP_XIDUSN

NUMBER

Transaction ID undo segment number of a transaction on which the transaction being applied by this apply server depends

DEP_XIDSLT

NUMBER

Transaction ID slot number of a transaction on which the transaction being applied by this apply server depends

DEP_XIDSQN

NUMBER

Transaction ID sequence number of a transaction on which the transaction being applied by this apply server depends

DEP_COMMITSCN

NUMBER

Commit system change number (SCN) of the transaction on which this apply server depends

MESSAGE_SEQUENCE

NUMBER

Number of the current message being applied by the apply server. This value is reset to 1 at the beginning of each transaction.

TOTAL_ASSIGNED

NUMBER

Total number of transactions assigned to the apply server since the apply process was last started

TOTAL_ADMIN

NUMBER

Total number of administrative jobs done by the apply server since the apply process was last started. See the STATE information in this view for the types of administrative jobs.

TOTAL_MESSAGES_APPLIED

NUMBER

Total number of messages applied by this apply server since the apply process was last started

APPLY_TIME

DATE

Time last message was applied

APPLIED_MESSAGE_NUMBER

NUMBER

Number of the last message applied

APPLIED_MESSAGE_CREATE_TIME

DATE

Creation time at the source database of the last captured message applied. No information about user-enqueued messages is recorded in this column.

ELAPSED_DEQUEUE_TIME

NUMBER

Time elapsed (in hundreths of a second) dequeuing messages since the apply process was last started

ELAPSED_APPLY_TIME

NUMBER

Time elapsed (in hundreths of a second) applying messages since the apply process was last started

Note:

The ELAPSED_DEQUEUE_TIME and ELAPSED_APPLY_TIME columns are only populated if the TIMED_STATISTICS initialization parameter is set to true, or if the STATISTICS_LEVEL initialization parameter is set to TYPICAL or ALL.